Yamaha RS90GTZ Service Manual page 250

CAMSHAFTS
2. Install:
• Intake camshaft
(with the camshaft sprocket)
• Exhaust camshaft
(with the camshaft sprocket)
Installation steps:
• Turn the crankshaft clockwise.
• When piston #3 is at TDC on the compres-
sion stroke, align the "I" mark
magneto rotor with the stationary pointer
on the AC magneto cover.
• Install the timing chain onto both camshaft
sprockets, and then install the camshafts.
TIP
• Install the camshafts with the hole
cylinder #3 - cam facing up.
• When installing the timing chain, start with
the intake camshaft and be sure to keep the
timing chain as tight as possible on the intake
side.
• Make sure the marks
sprockets are parallel with the edge of the cyl-
inder head.
: Cylinder #3 - cam
3. Install:
• Dowel pins
• Intake camshaft caps
• Exhaust camshaft caps
TIP
• The "I" mark refers to the intake camshaft
caps and the "E" mark refers to the exhaust
camshaft caps.
• Install the camshaft caps with the arrow mark
pointing towards the right side of the
engine.
• Make sure the holes
aligned with the arrow mark
shaft caps.
5-25
ENG
on the AC
in the
on the timing chain
in the camshaft are
on the cam-